Air cleaner



H. HAEGLER May 6, 1930.

Aia CLEANER Filed May '7-, 1925- 5 sheets-sheet 1 INVENTOR EDDQDQDUQUUU May 6,1930. v H. HAEGLER 1,757,835

AIR CLEANER File@ May '7, 1925 5A sheets-sheet 2 lvNvEMfroR May A6, 1.930.'l H. HAE'GLER 1352835 AIR CLEANERv Filed May r47. 1925y 5 sheets-snaai 3 mvENToR Patented May S, i930 HENRY EAEGLER, OF GENEVA, SWITZERLAND AIB CLEANER Application led May 7, 1925, Serial No The present invention relates broadly to filters or air cleaners, and more particularly to cleaners of a construction adapting them for use With an internal combustion engine,

although the utility of the invention is not limited in this respect.

in my co-pending application, Serial No. 8,407, filed February 1l, 1925, I have disclosed and claimed advantages of a construc tion, for the general purpose herein contemplated, having a filtering medium preferably maintained under tension and subjected both to vibrations and jars. The present invention discloses one form of cleaner embodyl5 ing these features of construction and adapted for use with carburetors supplying internal combustion engines. in the accompanyingdravvings there are shown, for purposes of illustrationv only, certain preferred embodiments of the present invention, it being understood that the dravvings do not define the limits of my invention, as changes in the construction and operation disclosed therein may be made without departing either from the spirit ofthe invention or the scope of my broader claims.

ln the drawings; Figure l is a vertical sectional view through one form of cleaner constructed in no accordance With the present invention;

Figure 2 is a detail sectional view on an enlarged scale, through one of the cleaning members; v Figure 3 is a detail sectional view, on still a larger scale, illustrating one manner of clamping the ltering medium in position; lligure fiis a top plan view of a filtering member constructed in accordance with the disclosure of Figure 3;

Figure 5 is a top plan view of one form of separating and striking member;

Figure 6 is a'vie'vv corresponding to Figure and illustrating a slightly modified embodiment of the present invention;

Figure 7 is an enlarged detailA sectional view on the line Vil-VH of Figure 6;

Figure 8 is a side elevational vievv showing one commercial application of an air cleaner constructed. in accordance With the il@ present invention; and

. 28,579, and vin France January 28,1925.

Figure 9 is a vievsT similar to Figure 8, but partly broken away, illustrating still another application of the present invention.

in carrying out the present invention, in order to obtain all of the desired advantages, it is desirable to utilize a filtering medium of suitable material, such as'bolting cloth, free from fuzz, and thereby providing free interstitial ioW areas. It is also desirable that this filtering medium be mounted in such manner that it is maintained in a state of tension, and also free to vibrate, so that the lteringl surfaces thereof are maintained free from obstruction.

f In carrying out the present invention, there may be provided a suitable support, preferably in the form of a tube 2, having a large portion of its surface provided With a series of openings, these openings preferablyl being arranged in juxtaposed rows. rlhe tubular support 2 is adapted 4to receive a plurality of filtering members Il, each filtering member being preferably so constructed asto cooperate with one rovv of the openings 3, the members preferably being slipped onto the support in juxtaposed relationship. After all of the filtering members are in positionon the tubular support, they are adapted to be clamped in positionthereon. Conn veniently, this may be accomplished by providinga cup-shaped member 5, secured in any manner to the tubular support, preferably at some distance from the end thereofl to provide a projecting portion for the purpose hereinafter pointed out. The member 5 forms a stop and enclosure for the filtering members Ll. rEhe opposite end of the support 2 may be closed by a disk 6, having a central boss 7. This boss may be threaded to receive a clampin bolt 8, passing through a second cup-shaped member 9, and provided with aA ange 10, adapted to cooperate with the filtering members and compress the same as the clamping bolt is screwed into position. rlhe member 9 is preferably of considerably smaller diameter than the member 5, and may becentered in position therein by means of spring fingers l1.

Each of the filtering members may comprise annular strips of bolting cloth or other material 12, preferably arranged in pairs, and clamped at their outer edges by a U- shaped metallic clamping ring 13. The inner edges may be similarly clamped in separate fastening pieces 14. The pieces 14 may be held in predetermined spaced relationship by means of shouldered rivets 15 cooperating therewith to thereby dispose each pair of strips 12 inv inwardly diverging relationship. The desired tension may be maintained on the strips 12 by means of split expanding rings 16 located between the strips and bearing outwardlyagainst the binding pieces 13. If desired, the binding pieces may be further crimped to assist in holding the strips in position by forming thempwith a series of depressions 17.

During assembly, the filtering members before described, are adapted to alternate with separating and ,striking rings 18, preferably comprising a central annular portion adapted to cooperate with the tubularr Support and having radiating arms 19. Alternater arms may be formed with projections 20 extending in opposite directions. The length of the arms 19 is preferably such that the projections 20 will be directly opposite the edge binding pieces 13 when the parts are in assembled position, thereby tending to strike the same when the cleaner is subjected to vibration and free the filtering surfaces of any dust particles. During assembly, a tightjoint is preferably formed lbetween each of the filtering members and each surface of the separating and striking members by interosing a felt washer 21 therebetween. It will be understood that these Washers are compressed and thereby hold the parts firmly in position and prevent any air leakage between thefiltering. members.

In Figures 6 and 7 there is illustrated a slightly modified embodiment of the present invention, in which both the'edge binding pieces 13 and the inner binding pieces 14 are formed with clamping depressions 17. The inner binding pieces 14 are also illustrated as being provided with radially extending spring arms 21, tending to'maintain the strips 12 of the filtering medium in spaced relation, and also serving to maintain the desired tension thereon. The outer edges of the strips may be maintained in spaced relation by a yieldable or plastic washer 21.

In Figure 8 of the drawings I have illustrated one method of utilizing an air cleaner constructed in accordance with the present invention. In accordance with this embodiment, the projecting portion of the support 2, before referred to, may be clamped in cooperative relation to the air' intake of the carburetor 22 by means of a clamping ring 23. In operation, the air is drawn between the cup-shaped members 5 and 9, and thereafter comes into contact with the filtering members. Due to the depression existing within the tubular support 2, the air is drawn through the filtering members into the interior of the tubular support, and thence passes to the carburetor. The vibrations of the motor which is supplied by the carburetor to which the present air cleaner is adapted to be attached, as well as road vibrations of the vehicle, tend to maintain the surfaces of the filtering members in a continuous state of vibration, thereby maintaining the same free from adhering particles of dirt and the like. Also, by maintaining the filtering medium in a state of tension, and by providing free interstitial flow areas, an effective passage of the air is insured.

In Figure 9 of the drawings there is illustrated another method of commercially utilizing the present invention. In accordance with this disclosure, the air cleaners may have an open end portion engaged within a suitable casting 24, carried by the dash 25 of a vehicle. The casting 24 may be formed with a projection 26 adapted to cooperate with a flexible conductor 27 or the like, delivering to the intake of the carburetor. It will be understood that the operation of this form of the invention corresponds with that already described.

With a construction of the character disclosed herein, it is possible to provide a plurality of similar filtering members adapted to :be easily assembled in position, to thereby provide a large filtering surface offering a minimum resistance to the air being cleaned. This constitutes one of the advantages of the present invention, as in this manner the dimensions of the cleaner may be reduced to a minimum while maintaining a large filtering area.

Further advantages of the present invention arise from the provision of a perforated support carrying a plurality of filtering members. Still other advantages of the invention arise from the construction of the filtering members whereby the filtering rnedium is effectively maintained in a state of tension free to vibrate, whereby its dust separating capacity is increased, it being an established fact that a fast moving filtering medium separates more dust than a fixed one.

I claim: l

1. A filter, comprising a support, a plurality of adjacent separately removable annular filtering members mounted thereon, and striking members clamped between adjacent filtering members and cooperating with at least some of said filtering members, substantiall as described.

2. A lter, comprising a support, a plurality of separately removable filtering members mounted on said support, and separating and striking members alternating with said filtering members and clamped therebetween, substantially as described.

3. In an air cleaner, a body, a filtering member formed of discontinuous annular screen-like elements comprising cloth and assembled to provide an annular filtering surface, means supported by the cloth of certain of the elements for tensionin the cloth therein, the outer peripheries o said elements being free to oscillate by inertia, an axial support for said member, and stop means against which said elements are adapted to strike upon oscillation thereof, substantially as described.

4. In a filter comprising a unitary support, a plurality of adjacent separately removable annular filtering members mounted thereon, and a plurality of striking members secured to the support intermediate the filtering members and extending, outwardly from the support into position for striking some of said filtering members.

5. lin an air cleaner, a filtering member formed of discontinuous annular screen-like elements, each comprising cloth and assembled to provide an annular filtering surface having sides which converge toward the outer periphery thereof, a stop member means for tensioning the clothin each elekment for supporting its outer periphery, and in axial support for the inner peripherles of.

said filtering elements whereby said elements are Vmounted 'to ermit relative oscillation therebetweenby inertia and to engage with said sto member.

6. A lter,l comprising a sup ort having ,a

i plurality of circumferential y .extending rows of openings formed therein, a separate `continuous and irregular movement, -thesupport having a plurality of openings therein, filter strips secured to the support between certain of the rows of openings, certain of the filter strips being secured at their outer edges for constitutin filtering members, tensioning means provi ed Within each'filtering member, and striking members secured to the members, and extending outwardly into juxtaposition to the edges of the iilterin members, whereby inertia causes the ltering `members and the striking members to collide during movement of the air cleaner, substantially as described.

8. In an air cleaner, a support ada ted to be mounted on a vehicle normally.v aving continuous and irrel ular movement, the support having a row o openings therein, an annular filter member. surroundln the` row of openings comprising a pair ol converging `my hand.

filtering strips secured together at their outer edge, tensioning means for the filtering strips and a striking member secured tothe sup ort adjacent the end of a diverging. strip o the annular filter member with its outer end disposed adjacent to the outer edge of the filtering member, whereby upon movement of the airfcleaner the filtering member is caused to collidel with the striking member and have vibratory motion imparted thereto, substantially as described.

9. A filter, comprising a tubular support, a plurality of filtering members slipped on said support, and spaced overlapping cupshaped covers extending around said members, substantially as described.

210. A. filter, comprising a tubular perforated support, a plurality of individually removable annular filtering members slipped on said support and surrounding the perforation therein, means for maintaining said filtering members under tension, and spaced overlapping cup-shaped covers for said members, substantially as described.

l1. In an air cleaner, a filtering member formed of separate annular screen-like elements assembled to provide an annular filtering surface, separate tensioning means' carried by certain of said elements, the outer peripheries of" said elements being free to oscillate byinertia, and an axial support for said member, substantially as described.

12. In an air cleaner, a filtering member formed of a plurality of annular screen-like elements comprising cloth and assembled to provide an annular filtering surface, the outer peripheries of said elements being free to oscillate by inertia, means for tensioning the cloth of each element to support its outer periphery, and a perforated axial sup ort for said member, substantially as descri ed.

In testimony whereof I'have hereunto set HENRY HAEGLER.

support withinv the edges ofv said filtering llfl 

